Electronic vibrator insulator



Sept. 16, 1952 E, A, WILSON ELECTRONIC VIBRATOR INSULATOR Filed NOV. 9, 1949 INVENTOR. Elmar-K fusa/w MMP@ j /7 [ams/7:2

This invention relates l thereof.

Patented Sept. 16, 1952 UNITED STATES PATENT OFFICE 2,611,064 ELECTRONIC VIBRATOR INSULATOR- Elmer A. Wilson, Beech Grove, Ind. l Application November 9, 1949, Serial No. 126,369

to .a rubber can vibration insulator for electronic vibrators.

Electronic vibrators and similar devices are self and/or such other parts may have a deleterious eect and/or shorten the normal life and usage thereof.

Heretofore it has been proposed to utilize sponge rubber for such purpose and it has been -so used. However, a vibrator may create a large amount of heat, which heat, it has been found, reacts with the softener used (usually of an oil type) so that the sponge rubber cushion fails rapidly in service.

A sponge rubber cushion for a vibrator and now in commercial use,-when subjected to a temperature of 400 F., failed in thirty (30) minutes. that is slumped and collapsed so that it -lost its shape. l The insulator of the present invention when tested at the same temperature failed to show any tendency to collapse even at the end of sixY (6) hours. Y

, Accordingly, la second object of the invention is to provide a cushion of a form of rubber that does not failwhen subjected to prolonged and/or excessive temperature abuse. f

One of the features ofv the invention resides ir. the use of a soft rubber or rubber-like material that is not of sponge character.

Another feature of the invention is to provide a structure that is ofv heat dissipating character having regard to the form, shape and outline Other objects and features of the invention will be set forth more fully hereinafter.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims:

' In the drawings,

' Fig. 1 is a central sectional view through a vibrator in which is embodied the present invention.

jFig. 2 is a perspective view of the cushion can portion of the invention, a portion thereof being broken away to show a portion of the side y wall interior in greater detail.

Fig. 3 is a perspective view of the cushion base 1- looking down upon the top thereof.

s claims. (o1. 20o-16s) Fig. 4 is a similar view of the same part looking at the bottom thereof.

Fig. 5 is a view similar to Fig. 3 and of a modied form of base.

Fig. 6 is a view similar to Fig, 3 and of another modied form of base.

In Fig. 1 of the drawings, I0 indicates a conventional junction block from which rises standard II supporting a magnet coil or relay I2 and also supporting reed I3 with armature or keeper Iiia disposed contiguous to said magnet and magnetically responsive thereto. I4 and I5 indicate switch blades or leaves carried by said block and these terminate in contacts I4? and I5. All the aforesaid is conventional. A vibrator unit of this type is so well known it requires no additional description to disclose the wiring circuit and the operation of such unit except to say that herein I6 indicates the four connector prongs of such unit and I1 indicates wire connections between said prongs and the various circuit elements 'of the unit.

Since the aforesaid is provided with four connecting terminal prongs, although a greater or lesser number may be provided, whether used 0r not, the present invention accordingly will be described as associated with four prongs, the latter being insulatably mounted upon a Bakelite base member I8.

A metal can I9 has its open end dened by an inturned portion 20 and an adjacent indented portion 2i. When this can is' applied over the unit the member I8 is trapped between portions 20 and 2| and the unit is fully protected mechanically, and all parts, except projecting prong I6, are enclosed. In general, al1 the aforesaid may be said to be conventional to the present state of the vibrator art.

Disposed within the metal can I9 and in intimate contact therewith as hereinafter pointed out is a soft rubber can, see Fig. 1, having the top 22 and cylindrical side wall 23. The top 22 has annular ridges 24 disposed exteriorly thereof and contacting the top of the metal can.

The outside of the rubber can side wall 23, see Figs. 1 and 2, is provided with a plurality of substantially longitudinally coextensive ribs 25 that project radially outward as shown. The

A 2l which extend to the top 22 as shown but which i at the bottom terminate in spaced relation to the mouth' of said can providing a smooth bore portion 28.

.The thickness of the can and softness of the cured rubber utilized will permit the can to be readily turned inside out and vice versa if desired or required in fabrication or certain uses. The drawings, while not to scale, do, however, illustrate comparative thickness so that it will be apparent that regardless of any other advantage, etc., the present invention requires much less rubber .material itc-attain comparable 'and 4better results than' heretofore attained with sponge rubber.

The aforesaid sock thus provides interior heat pickup ribs which transfer theircOlIeCtedheat to the body wall from which it is transferred to the metal can for iinal dissipation.L T:.in...

crease heat transfer from..the...device.themetal can is apertured near the top at 9 and near' the indented portion 2i as at 8. This providesV .for

tially rectangular in outer outline is circular and is exteriorly provided with vertical ribs |39'.

Reference will now be had to Fig. 6 wherein 200 series numerals are similarly utilized. In this form the closure is more closely similar to that shown in Fig. but it herein includes annular ribs 233.

By way of example only the solid resilient material-used was asynthetic Srubber'known as Afterial were obtained by curing the compound ...for-.about .twenty minutes at 300 F. However,

ltemperature of about 400 F. and for a shorter some of this material to all appearances and tests-servedlequally as well when cured at a time, to wit, about'nine minutes. Certain grades ofxpolystyrene have flexible characteristics and circular ventilation aiding materially in heat disfsipation and reducing interior teinperature;..rise. Note the solid rubberfhas--a .better..coeilcient .tion heat transference :than spongev rubber,. vthus further insuring more rapid dissipationof :heat. ..lliheinside ribs have .the further-.function of absorbing sound waves produced incident to vibrator fuses Since the.;.space-between thetwowcans ',-is sealedroifbyrthe. top ring-s2@y and. bottom `flange 6,-the 4internal rsoundwaves therein cannotv cirulate between: the.l two.'A walls `but escape Aat Athe ...,holesfinthemetal-can. -r f l snReference-yvill' now-befhadto Figs, l,` 3 andv 4 e. :wherein fthe soft. fiubber Vbase .insulator .or:.pl,ug :i closure Y is illustrated; V.Herein-e0 vindicat es -a Wall i.imemberprovidedwith an outwardly and downt ii/'ardlyv directed ared" shell portion 3 Lterminat- .-inggin a` downwardlysdirected-skirt or rim 32.

r.'lfhe-rbase includes-therethrough circuit wire -passing-,holes disposed in predetermined spaced .relation^,..as=. shown.v see Fig.. .4. Extending upl-wardlyfrom said base -3 )V and integralv .therewith is a housing portion that is hollowandLis .fclosedl-byanfintegral circular cap 35. q The latter includes opening "3 i rectangular inv outline,Y see `gflig. 3, providingaccessto the chamberin hous- .fing-f35 or theinteriorof said housing.

:The cap oilsaid housing vprojectsbeyond Ythe esame-ras shown. It also .hasfitsupper surface annularly ribbed as indicated at '38, the Aconcentricv ri'bbingrhereinebeingspaced closer than those =-.onfthe .rubber :can or sock top..

.1. 'Ir'hefrnountaor ibase ifis received.inthe plug closure chamber andv .trapping retainedby the :cap-edges atopeningfl. 'The wall of saidhousringe-an' yield-for any .de- Forming element, :'such y as .terminal stud, l; see Fig. 1, whenevennecessary.

.The skirt-312 -cushions-.basefmember' I8v inithe metal can. As indicated previously,.circuit wires il: from-.prongs i6V .carried by member rI3 'pass through openings'S into' the housing for connecl, ..-'tion -to thecactiveelements of the vibratorcar- 60 riedby'the mount or block'-l0 aforesaid. .'If del '.sired the -cap might be* enlarged so that its'peare solid and are capable of withstanding a reasonableamount ofeheat .and.can-be.;used'fas a satisfactory Amaterial :when desired: or required. Other i types o f Vsynthetic rubberl than that speciiied .immediately .precedingiamayr Y{flisol-beY fused. The polystyrene mentioned is a rubber-like `plas- .tic which,` as state-d5. meetst the vibrator. requirement. rIliepreferred: material,v however; even though some Vforms rofY naturaly :rubber-acomvpounded material 'may well serve requirements, Visgthat-specifiedinitiallyherein. 30 `While .-the-.invention-'has.been illustratedV and described in great-:detail .ini .the Vdrawingsfland ..;foregoingdescription,` the :samer is :to '.be` considv ered-.fas :illustrative andlnot restrictivefiin. character. v

. Theseveral-modifications Adescribed nherein as well.V as others which-:will-y -readily suggest-themselves -lio-persons skilledin thisart, allareuconsidered to be-*withinnthe brcadscoperof .theri-n- `vention, reference being. had: tol therappiended claims.

The invention claimed is: l LfAnLenclosing casing lforavibratory'inter- 'rupter whichincludes a'staclc, a supporting frame carried -bysaidlstackl and `having a' driving magnet-'at-'its free' end-and a vibratory. reed support- 'ed bysaidstack and oppositely disposed Contact f' arms 'supported -byf-saidstack; said casing com- -prising a metallic-cylindrical openfbottomed shell and'a solid, relatively thin walledl rubber liner Yso'clrfor said shell having longitudinally' disposed "spaced apart ribs onr the outer 'surface 'of'isaid liner'contacting the inner surface of said shell; a resilient support forsaidfvibrato'r and aninsulating closurecapfsupporting said support and adapted' to vclose'V the bottomed `fopen end" of 4said shell. i

2,.-An1enclosing casing' for a vibratory'interf'rupterwhich'l--interrupter"comprises a stack; a supporting frame extending upwardly fromfsaid stack, a driving magnet supported onthelfree end yof said frame', a vibratory'reed supported in ripheraleedge could have .frictional fit 'with Said stackjl'ndoppostelydisposed Contactarms '-:smooth bore 28. It, hoWever, is not soshown. fsupppltdmnsald'Stack; Said 'endorsing @35mg .-Asbefore-this closure by virtue of annularmcompmsmg, afar-let??qpenfbottomd Cylindrical f ribs38absorbs sound waves. .Being of soft solid Shen ai Sohd rela'twlythn Walled-rubber lining ...rubber-lit better. conducts heat: than a sponge fm" .Said shell "havmg longitudinally disposed .rubberr basa Y LSllaCCdalJll?libsonthe 'outervsurfacethereof 'Reference Wm now be had to Fg '5 wherein; contacting`s`aid`shell and longitudinally extend- -amodied form of closure is illustrated. Herein mg Spared apart ribs 011 the inner Surface there- .numerals increased by 100Jindicate. parts ideni 'oflaf'rubbefsllpportngfmember'fol" Sad-'Stack '.-tical or similar to primary numeral. designated #lai/.ing fsket formed therein for the-'TCEPOH parts in rigs. 1,3 and 4. "The major'durerence "0f Said Steckend @insulating Vclosure.tan-for Yisthe'elimination of the annular. ribs 38..Here'inif.;v the .Open end `of said metallicY Shell Supporting however; the housing instead of being substan- `Sd`vbrat0`r Slipprtand'closing"thzlowerend of said shell, said insulating closing member carrying the contact prongs for the vibrator.

3. An enclosing casing for a vibratory switch which switch includes a stack, a frame extending upwardly from said stack and a driving magnet mounted at the free end of said frame, a vibrating reed supported in said stack and oppositely disposed contact arms carried by said stack, said enclosing casing comprising `a metallic cylindrical shell open at its bottom, a solid, relatively thin Walled rubber liner for said shell having longitudinally disposed spaced apart ribs on its outer surface contacting the inner surface of said shell, longitudinal spaced apart inner ribs on the inner surface of said liner stopping short of the bottom end of the liner and ribs on the top of said liner adapted to engage the inner surface of the enclosing shell, a rubber supporting base for said vibrator having a stack receiving REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,068,522 Thordarson Jan. 19, 1937 2,140,792 Dressel et al. Dec. 20, 1938 2,190,685 Slater Feb. 20, 1940 2,294,125 Neidermeier Aug. 25, 1942 2,478,101 Huetten Aug. 2, 1949 

